static unsigned long host_block_write(struct udevice *dev,
unsigned long start, lbaint_t blkcnt,
const void *buffer)
{
struct host_block_dev *host_dev = dev_get_priv(dev);
struct blk_desc *block_dev = dev_get_uclass_platdata(dev);
#else
static unsigned long host_block_write(struct blk_desc *block_dev,
unsigned long start, lbaint_t blkcnt,
const void *buffer)
{
int dev = block_dev->devnum;
struct host_block_dev *host_dev = find_host_device(dev);
#endif
if (os_lseek(host_dev->fd, start * block_dev->blksz, OS_SEEK_SET) ==
-1) {
printf("ERROR: Invalid block %lx\n", start);
return -1;
}
ssize_t len = os_write(host_dev->fd, buffer, blkcnt * block_dev->blksz);
if (len >= 0)
return len / block_dev->blksz;
return -1;
}
int host_get_dev_err(int dev, block_dev_desc_t **blk_devp)
{
struct host_block_dev *host_dev = find_host_device(dev);
if (!host_dev)
return -ENODEV;
if (!host_dev->blk_dev.priv)
return -ENOENT;
*blk_devp = &host_dev->blk_dev;
return 0;
}
static unsigned long host_block_write(int dev, unsigned long start,
lbaint_t blkcnt, const void *buffer)
{
struct host_block_dev *host_dev = find_host_device(dev);
if (os_lseek(host_dev->fd,
start * host_dev->blk_dev.blksz,
OS_SEEK_SET) == -1) {
printf("ERROR: Invalid position\n");
return -1;
}
ssize_t len = os_write(host_dev->fd, buffer, blkcnt *
host_dev->blk_dev.blksz);
if (len >= 0)
return len / host_dev->blk_dev.blksz;
return -1;
}
int host_dev_bind(int dev, char *filename)
{
struct host_block_dev *host_dev = find_host_device(dev);
if (!host_dev)
return -1;
if (host_dev->blk_dev.priv) {
os_close(host_dev->fd);
host_dev->blk_dev.priv = NULL;
}
if (host_dev->filename)
free(host_dev->filename);
if (filename && *filename) {
host_dev->filename = strdup(filename);
} else {
host_dev->filename = NULL;
return 0;
}
host_dev->fd = os_open(host_dev->filename, OS_O_RDWR);
if (host_dev->fd == -1) {
printf("Failed to access host backing file '%s'\n",
host_dev->filename);
return 1;
}
block_dev_desc_t *blk_dev = &host_dev->blk_dev;
blk_dev->if_type = IF_TYPE_HOST;
blk_dev->priv = host_dev;
blk_dev->blksz = 512;
blk_dev->lba = os_lseek(host_dev->fd, 0, OS_SEEK_END) / blk_dev->blksz;
blk_dev->block_read = host_block_read;
blk_dev->block_write = host_block_write;
blk_dev->dev = dev;
blk_dev->part_type = PART_TYPE_UNKNOWN;
init_part(blk_dev);
return 0;
}
int host_get_dev_err(int devnum, struct blk_desc **blk_devp)
{
#ifdef CONFIG_BLK
struct udevice *dev;
int ret;
ret = blk_get_device(IF_TYPE_HOST, devnum, &dev);
if (ret)
return ret;
*blk_devp = dev_get_uclass_platdata(dev);
#else
struct host_block_dev *host_dev = find_host_device(devnum);
if (!host_dev)
return -ENODEV;
if (!host_dev->blk_dev.priv)
return -ENOENT;
*blk_devp = &host_dev->blk_dev;
#endif
return 0;
}
